A wire closer is a specialized device that closes twin-loop wires and Spiral-O wires in order to complete the binding process. Wire closers are available in both manual and electric versions to accommodate production volumes of all levels. Regardless of operation method, wire closers all function by applying uniform pressure to the wire binding spine in order to close the wire and secure the documents in place.
Though most wire binding machines feature built-in wire closers, they are also available as stand-alone units which be used to increase efficiency in a production environment. Since Spiral-O wires utilize the same punch pattern as comb binding, a wire closer is used in conjunction with a comb binding machine in order to finish the bind.